Select the word from the list that best fits the definition group without clear boundaries or common identity.

Match each person with his contribution. aristotle socrates eratosthenes hippocrates he studied the causes of illnesses in search of cures. he created a teaching method that involved asking questions. he determined that earth was round. he educated alexander the great.

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?

The united states economy makes up how much of the worlds economy